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114 lines
3.3 KiB
114 lines
3.3 KiB
/* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file |
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* Contains misc utility macros and inline functions |
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*/ |
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#ifndef AVUTIL_PPC_UTIL_ALTIVEC_H |
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#define AVUTIL_PPC_UTIL_ALTIVEC_H |
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#include <stdint.h> |
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#include "config.h" |
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#if HAVE_ALTIVEC_H |
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#include <altivec.h> |
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#endif |
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#include "types_altivec.h" |
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#if HAVE_ALTIVEC |
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// used to build registers permutation vectors (vcprm) |
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// the 's' are for words in the _s_econd vector |
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#define WORD_0 0x00,0x01,0x02,0x03 |
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#define WORD_1 0x04,0x05,0x06,0x07 |
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#define WORD_2 0x08,0x09,0x0a,0x0b |
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#define WORD_3 0x0c,0x0d,0x0e,0x0f |
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#define WORD_s0 0x10,0x11,0x12,0x13 |
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#define WORD_s1 0x14,0x15,0x16,0x17 |
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#define WORD_s2 0x18,0x19,0x1a,0x1b |
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#define WORD_s3 0x1c,0x1d,0x1e,0x1f |
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#define vcprm(a,b,c,d) (const vector unsigned char){WORD_ ## a, WORD_ ## b, WORD_ ## c, WORD_ ## d} |
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// Transpose 8x8 matrix of 16-bit elements (in-place) |
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#define TRANSPOSE8(a,b,c,d,e,f,g,h) \ |
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do { \ |
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vector signed short A1, B1, C1, D1, E1, F1, G1, H1; \ |
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vector signed short A2, B2, C2, D2, E2, F2, G2, H2; \ |
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\ |
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A1 = vec_mergeh (a, e); \ |
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B1 = vec_mergel (a, e); \ |
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C1 = vec_mergeh (b, f); \ |
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D1 = vec_mergel (b, f); \ |
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E1 = vec_mergeh (c, g); \ |
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F1 = vec_mergel (c, g); \ |
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G1 = vec_mergeh (d, h); \ |
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H1 = vec_mergel (d, h); \ |
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\ |
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A2 = vec_mergeh (A1, E1); \ |
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B2 = vec_mergel (A1, E1); \ |
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C2 = vec_mergeh (B1, F1); \ |
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D2 = vec_mergel (B1, F1); \ |
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E2 = vec_mergeh (C1, G1); \ |
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F2 = vec_mergel (C1, G1); \ |
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G2 = vec_mergeh (D1, H1); \ |
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H2 = vec_mergel (D1, H1); \ |
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\ |
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a = vec_mergeh (A2, E2); \ |
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b = vec_mergel (A2, E2); \ |
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c = vec_mergeh (B2, F2); \ |
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d = vec_mergel (B2, F2); \ |
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e = vec_mergeh (C2, G2); \ |
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f = vec_mergel (C2, G2); \ |
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g = vec_mergeh (D2, H2); \ |
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h = vec_mergel (D2, H2); \ |
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} while (0) |
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/** @brief loads unaligned vector @a *src with offset @a offset |
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and returns it */ |
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static inline vector unsigned char unaligned_load(int offset, uint8_t *src) |
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{ |
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register vector unsigned char first = vec_ld(offset, src); |
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register vector unsigned char second = vec_ld(offset+15, src); |
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register vector unsigned char mask = vec_lvsl(offset, src); |
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return vec_perm(first, second, mask); |
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} |
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/** |
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* loads vector known misalignment |
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* @param perm_vec the align permute vector to combine the two loads from lvsl |
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*/ |
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static inline vec_u8 load_with_perm_vec(int offset, uint8_t *src, vec_u8 perm_vec) |
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{ |
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vec_u8 a = vec_ld(offset, src); |
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vec_u8 b = vec_ld(offset+15, src); |
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return vec_perm(a, b, perm_vec); |
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} |
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#define vec_unaligned_load(b) \ |
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vec_perm(vec_ld(0, b), vec_ld(15, b), vec_lvsl(0, b)); |
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#endif /* HAVE_ALTIVEC */ |
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#endif /* AVUTIL_PPC_UTIL_ALTIVEC_H */
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